VERY IMPORTANT BAKING issue and need input. I am considering this model. I am a professional cake baker who has used an electric oven for 10 years. I am known for my moist cakes and I understand going gas would be even better. I am so afraid of spending $4000.00 and end up being disappointed. I have heard things like it takes 30 minutes to heat up, not even baking ( its a convection! ). Anyone use this model for baking? Thanks : )